210121021012 has 24 divisors (see below), whose sum is σ = 433798238720. Its totient is φ = 87146966880.

The previous prime is 210121020997. The next prime is 210121021057. The reversal of 210121021012 is 210120121012.

It is a super-2 number, since 2×210121021012² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210121020983 and 210121021001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121036587 + ... + 121038322.

Almost surely, 2^210121021012 is an apocalyptic number.

It is an amenable number.

210121021012 is an abundant number, since it is smaller than the sum of its proper divisors (223677217708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210121021012 is a wasteful number, since it uses less digits than its factorization.

210121021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242074951 (or 242074949 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210121021012 its reverse (210120121012), we get a palindrome (420241142024).

The spelling of 210121021012 in words is "two hundred ten billion, one hundred twenty-one million, twenty-one thousand, twelve".